feat: add create-vuepress-theme-plume package

[pengzhanbo]

创建新项目：

# pnpm
pnpm create vuepress-theme-plume
# npm
npm init vuepress-theme-plume
# yarn
yarn create vuepress-theme-plume

在现有项目中初始化：

# pnpm
pnpm dlx create-vuepress-theme-plume init
# npm
npx create-vuepress-theme-plume init
# yarn
yarn dlx create-vuepress-theme-plume init

#22

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[netlify]

✅ Deploy Preview for vuepress-plugin-plume ready!

Name	Link
🔨 Latest commit	83c8aef
🔍 Latest deploy log	https://app.netlify.com/sites/vuepress-plugin-plume/deploys/66cff2583936ee00086995a1
😎 Deploy Preview	https://deploy-preview-153--vuepress-plugin-plume.netlify.app
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